Crane Company accumulates the following data concerning a mixed cost, using units produced as the activity level. Units Produced Total Cost March 9.990 $19,257 April 8,900 18,997 May 10,500 20,947 June 8,700 18,517 July 9,370 19,387 Compute the variable cost per unit using the high-low method. (Round answer to 2 decimal places e.g. 2.25.) Variable cost per unit $